Nuclear effects in the proton-deuteron Drell-Yan process
Abstract
We compute the nuclear corrections to the proton-deuteron Drell-Yan cross section for inclusive dilepton production, which, when combined with the proton-proton cross section, is used to determine the flavor asymmetry in the proton sea, dbar - ubar. In addition to nuclear smearing corrections that are known to be important at large values of the nucleon's parton momentum fraction x_N, we also consider dynamical off-shell nucleon corrections associated with the modifications of the bound nucleon structure inside the deuteron, which we find to be significant at intermediate and large x_N values. We also provide estimates of the nuclear corrections at kinematics corresponding to existing and planned Drell-Yan experiments at Fermilab and J-PARC which aim to determine the dbar/ubar ratio for x < 0.6.
Keywords
Cite
@article{arxiv.1405.2039,
title = {Nuclear effects in the proton-deuteron Drell-Yan process},
author = {P. J. Ehlers and A. Accardi and L. T. Brady and W. Melnitchouk},
journal= {arXiv preprint arXiv:1405.2039},
year = {2015}
}
Comments
26 pages, 6 figures; Fig. 2 and typos corrected, published version